Nitric oxide
Colourless toxic gas, relatively insoluble in water. When exposed to oxygen
(including air), nitric oxide is converted into nitrogen dioxide.
Chemical formula
NO
Molar weight
30
Relative gas density (to air)
1.03
Conversion
1 ppm = 1.23 mg/m
3
Boiling point
-152 °C
Flammability
Nonflammable, but accelerates the
burning of combustible materials.
Odour
Pure NO is odourless, but in the air it
oxidizes to NO
2
which has a pungent
odour
Hazards
Irritates respiratory tract and eyes, at
high concentrations may cause lung
edema and death.
Exposure
limits
(Directive 91/322/EEC)
TWA
30 mg/m
3
/25 ppm
IDLH (NIOSH) 123 mg/m
3
/100 ppm
Conversion of ppm to mg/m
3
is calculated for 25°C and 1 atm.
Installation guidelines
(See Installation and connections section for general information.)
Nitric oxide has practically the same density as air. As it is easily oxidized to form
nitrogen dioxide, the sensor should be placed as close as possible to the gas source.
Calibration
E2608-NO detectors have been calibrated by Manufacturer with standard gas
mixtures before delivery. Provided that the sensor is used under moderate
conditions,the recommended interval for field recalibration is 6 months. Please
contact your dealer for more information.
Maintenance
Do not perform any maintenance operation with the power on.
Clean the device with soft damp cloth. Do not use any abrasive cleaning agents. Do
not immerse the device into water or any cleaning media.
Delivery set
–Detector-transmitter E2608 (wall mount or duct mount version)
– Mounting accessories:
4 cross-shaped mounting lug with screws and 4 screws with plastic dowels for wall
mount version
rubber flange for duct mount version
fixing clamp for remote probe versions
E2608-NO_UM_EN
Rev 06.06.2020
Specifications
Sensor type
electrochemical cell
Sampling method
diffusion
Typical detection range
0...250 ppm
Maximum overload
1000 ppm
Resolution / digital unit
1 ppm
Response time T90
< 40 s
Sensor lifetime
> 12 months
Calibration interval
6 months
Signal update
every 1 second
Power supply options
11...30 VDC, 24 VAC
or 90...265 VAC (with mains power unit)
Power consumption
< 2 VA
Load resistance
R
L
< (Us - 2 V) / 22 mA for 4-20 mA
R
L
> 250 kOhm for 0-10 V mode
Digital interface
RS485, Modbus RTU protocol
no galvanic isolation
Analog outputs
2 × 4-20 mA / 0-10 V, user settable
Outputs assignment
OUT1 2 gas; OUT2 2 gas
Output scale width
> 10 × resolution
Recommended: 20-100% of the detection range
Relay otputs
2 × SPST, max 5 A, 30 VDC / 250 VAC
Default alarm setpoints
RE1 (LOW): set 10 ppm, release 8 ppm
RE2 (HIGH):set 25 ppm, release 20 ppm
Cable connections
screwless spring loaded terminals
Enclosure
grey ABS, wall mount, protection class IP65
Dimensions
H85 × W82 × D55 mm
CE marking
according to 2014/30/EU and EN61326-1 requirements
Operating conditions
-30...50 °C, 15...90% RH non-condensing, 0,9...1,1 atm
explosion safe indoor areas, non-aggressive atmosphere
NOTE The sensor may exhibit considerable sensitivity to
hydrogen sulfide and nitrogenr dioxide
Warranty
This product is warranted to be free from defects in material and workmanship for a
period of one year from the date of original sale. During this warranty period
Manufacturer will, at its option, either repair or replace product that proves to be
defective. This warranty is void if the product has been operated in conditions outside
ranges specified by Manufacturer or damaged by customer error or negligence or if
there has been an unauthorised modification.
Evikon MCI OÜ
Teaduspargi 7/9, Tartu
Tel. +372 733 6310
50411 Estonia
www.evikon.eu
PluraSens
®
Nitric Oxide Detector-Transmitter
E2608-NO
User Manual
